GEIGY, R. Dr., Prof. — Schweiz. Tropeninst., Socinstr. 57, 4051 BASEL, Switzerland 



— Zool. Anstalt der Univ., Rheinsprung 9, 4000 BASEL, Switzerland 

 GEILENKIRCHEN, W. L. M. Ph.D. — Zool. Lab., State Univ. of Utrecht, Janskerkhof 3, 



UTRECHT, Netherlands 

 a Metabolism and respiration of egg and embryo. Lymnaea stagnalis (Gastropoda) 

 b Influence of various kations on development. Same species as a 

 c Mechanisms of cytodifferentiation in cleaving eggs. Same species as a 



d Germinal localization in eggs. Dentalium spec. (Scaphopoda) ; Patella spec. (Gastropoda) 

 GENIS-GALVEZ, J. M. Med.Dr., Ph.D., Prof. — Dept. of Anat., Fac. of Med., Univ. of 



Granada, GRANADA, Spain 

 GEORGE, J. C. Ph.D., Prof. — Dept. of Zool., Univ. of Guelph, GUELPH, Ont., Canada 

 GEORGES, Miss D. Dr.spec — Lab. de Zool., Inst, de Rech. Biol., Univ. Scient. et Med. de 



Grenoble, Cedex 53, 38 GRENOBLE, France 

 a Development of the gonads: role of the neural complex and other factors in sperma- 

 togenesis and oogenesis. Ciona intestinalis (Ascidiacea) 

 b Development and cyclic changes in the neural gland; morphology, physiology, and ultra- 



structure. Same species as a 

 GEORGIEV, G. P. Dr. — Inst, of Molec. Biol., Acad, of Sci. of the U.S.S.R., Vavilov St. 



32, MOSCOW B-312, U.S.S.R. 

 GERHARDT, Mrs. S. — Arbeitsgr. Prof. G. H. M. Gottschewski am Max-Planck-Inst. fur 



Immunbiol., Stefan-Meier-Str. 8, 7& FREIBURG i.Br., W.Germany 

 a Differentiation of primordia analysed by the use of actinomycin, applicated in early 



cleavage stages. Oryctolagus cuniculus (Lagomorpha) 

 GERISCH, G. Dr.rer.nat. — Friedrich-Miescher Lab. der Max-Planck Gesellschaft, Spemann- 



str. 37-39, Postfach 2109, 74 TUBINGEN, W.Germany 

 a Differentiation of cell membranes. Dictyostelium discoideum (Acrasiales) 

 b Immunochemical studies on cell differentiation Same species as a 

 c Developmental effects and chemistry of an inhibitor of cyclic AMP-phosphodiesterase. 



Same species as a 

 GERLINGER, P. Dr.en Med. — Inst. d'Embryol., Fac. de Med., 11 rue Humann, 67 STRAS- 

 BOURG, France 

 a Etude de la formation des constituants de l'oeuf. Gallus domesticus (Aves) 

 b The possible role of liver tRNAser isoacceptors and seryltRNA synthetase in phosvitin 



synthesis. Gallus domesticus (Aves) 

 GERZELI, G. Prof. — Inst, of Comp. Anat., Univ. of Pavia, Piazza Botta 10, 27100 PAVIA, 



Italy 

 a Egg-shell formation and vitellin cells (histochemistry, histomorphology, biochemistry). 



(Platyhelminthes) 

 b Allantois and urinary bladder (histochemistry, histomorphology) . (Chelonia) 

 GETTMANN, W. W. — Inst, fur Genet., Univ. des Saarlandes, 66 SAARBRUCKEN 11, 



W.Germany 

 a Influence of inorganic ions on DNA synthesis and other events of the cell cycle. Locusta 



spec, Schistocerca spec. (Orthoptera), Chironomus spec. (Dipteva) 

 GEUSKENS, M. D.Sc. Zool. — Lab. de Cytol. et Embryol. Molec, Univ. libre de Bruxelles, 



67 rue des Chevaux, 1640 RHODE-ST-GENESE, Belgium 

 a Etude par microscopie electronique et autoradiographic a haute resolution, de l'influence 



des constituants cytoplasmiques sur la transcription des genes au cours du developpement 



embryonnaire. Xenopus laevis (Anura), Pleucodeles waltlii (Urodela), Ilyanassa obsoleta 



(Gastropoda) 

 GEZELIUS, N. G. B. Fil.lic — Zool. Inst., Univ. of Uppsala, Box 561, S-75122 UPPSALA 



1, Sweden 

 a Studies with labelled precursors of the correlations between protein synthesis and morphol- 

 ogical development and of the interactions between nucleus and cytoplasm. Paracentrotus 



lividus, Psammechinus miliaris (Echinoidea) 

 GHIRARDELLI, E. Prof. — Inst, of Zool. and Comp. Anat., Univ. of Trieste, Via A. 



Valerio 32, 34127 TRIESTE, Italy 

 a Germ cell differentiation. (Planariidae, Turbellaria) 



b Germ cell differentiation. (Bidder's organ differentiation). Bufo bufo (Anura) 

 c Germ cell determinant. Spadella cephaloptera (Chaetognatha) 

 GIACOBINI, G. M.D. — Dept. of Human Anat., Univ. of Torino, Corso M. DAzeglio 52, 



10126 TORINO, Italy 

 a Development of neuro-muscular correlations in the embryo; choline acetyltransferase 



(ChAc) and acetylcholinesterase (AChE) activity. Gallus domesticus (Aves) 

 b Developmental changes of enzymes involved in the metabolism of transmitters in spinal 



and sympathetic ganglia of the embryo. Same species as a 

 GIANNETTI, A. M.D. — Dept. of Dermatol., Univ. of Pavia, Policlinico S.Matteo, 27100 



PAVIA, Italy 

 a Mucoproteins in fetal skin. Homo sapiens (Primates) 

 b Developmental changes of glycosaminoglycan content in fetal epidermis. Homo sapiens 



(Primates) 



64 



